unc-5 Antibody
Description
Introduction to Unc-5 Receptors and Antibodies
The Unc-5 receptor family includes four members (Unc5A–Unc5D), each characterized by extracellular Ig and thrombospondin type 1 (TSP1) domains, a transmembrane helix, and intracellular signaling domains (ZU5, UPA, and death domain) . These receptors bind ligands such as netrins, FLRTs, and GPC3 to mediate repulsive guidance in neuronal and vascular systems . Antibodies targeting Unc-5 receptors are essential for elucidating their expression patterns, structural interactions, and roles in diseases like cancer.
Functional Roles
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Axon Guidance: Unc5B and Unc5D mediate repulsive responses in cortical neurons via interactions with GPC3 and FLRTs .
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Cancer: Downregulation of Unc5A/D correlates with poor prognosis in colorectal, ovarian, and lung cancers .
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Cell Migration: Unc5D-GPC3 complexes regulate radial migration of cortical neurons and neuroblastoma cells .
Table 1: Unc-5 Antibody Profiles
Experimental Workflows
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Western Blot (WB): Unc5B (130 kDa) detected in brain lysates using Clone D9M7Z .
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Immunohistochemistry (IHC): Unc5C shows strong staining in mouse brain sections post-antigen retrieval .
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Surface Plasmon Resonance (SPR): Quantified Unc5D-GPC3 binding affinity (<i>K</i><sub>d</sub> = 1.7 μM) .
Table 2: Clinical Relevance of Unc-5 Receptors
Clinical and Therapeutic Implications
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Biomarker Potential: Unc5A/D expression levels serve as prognostic indicators in multiple cancers .
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Therapeutic Targets: Modulating Unc5-GPC3 interactions with nanobodies disrupts cancer cell migration .
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Drug Development: Heparin-mimetic compounds could enhance netrin-mediated repulsion in axon regeneration .
Product Specs
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Target Background
- UNC-5 necessitates both Ig domains to interact with netrin. PMID: 15574733
- UNC-51 and UNC-14 regulate the subcellular localization of the Netrin receptor UNC-5, and UNC-5 utilizes a unique mechanism for its localization. PMID: 16887826
- The axon guidance cue UNC-6/netrin and its receptor UNC-5 function throughout development to exclude synaptic vesicle and active zone proteins from the dendrite of the Caenorhabditis elegans motor neuron DA9, which is proximal to a source of UNC-6/netrin. PMID: 18776887
- UNC-129, exhibiting a graded expression opposite to UNC-6/netrin, operates independent of the canonical TGF-beta receptors to regulate UNC-5 cellular responses. PMID: 19169249
- The enhancement of unc-5 caused by an sdn-1 mutation was rescued by expression of wild-type sdn-1 in the hypodermis or nervous system rather than the distal tip cell (DTC). PMID: 19631636
STRING: 6239.B0273.4a
UniGene: Cel.18168
Q&A
Frequently Asked Questions on UNC-5 Antibody Research
Advanced Research Questions
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How to resolve contradictions in UNC-5 antibody performance across model systems?
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Case example:
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Issue: Antibodies detecting UNC-5 in human cell lines fail in Drosophila models due to epitope divergence.
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Solution: Use species-specific antibodies or engineer chimeric proteins with conserved epitopes. For instance, murine UNC-5 antibodies validated in spinal cord neurons may require optimization for invertebrate models .
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Data-driven approach: Compare post-translational modification profiles (e.g., tyrosine phosphorylation states in netrin signaling) between systems .
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What strategies optimize UNC-5 antibody use in co-immunoprecipitation (Co-IP) assays?
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Best practices:
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Pre-clear lysates with protein A/G beads to reduce non-specific binding.
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Include kinase inhibitors (e.g., FAK/Src inhibitors) to preserve phosphorylation-dependent interactions, as UNC-5-Src binding is phosphorylation-sensitive .
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Validate interactions with reciprocal IP (e.g., Src antibody pulling down UNC-5 and vice versa) .
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How to design functional studies for UNC-5 antibodies in translational cancer research?
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Framework:
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Step 1: Profile UNC-5 isoforms (A/B/C/D) in patient-derived tumor samples using RT-qPCR or NanoString to identify dominant targets .
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Step 2: Test antibody efficacy in in vitro models (e.g., organoids) via:
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Step 3: Prioritize candidates showing dual activity in tumor suppression and immune modulation (e.g., reduced TMB or MSI) .
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Table 1: UNC-5 Isoform-Specific Antibody Performance
| Isoform | Validated Applications | Key Challenges | Citations |
|---|---|---|---|
| UNC-5A | TME immune infiltration, HNSC prognosis | Cross-reactivity with UNC-5D | |
| UNC-5B | Netrin signaling, axon guidance | Phosphorylation-dependent epitopes |
Table 2: Common Pitfalls in UNC-5 Antibody Studies
| Issue | Solution |
|---|---|
| Low signal in Western blotting | Use RIPA buffer with phosphatase inhibitors |
| Non-specific bands in Co-IP | Pre-absorb antibodies with UNC-5 knockout lysates |
| Inconsistent IHC results | Optimize antigen retrieval (e.g., citrate buffer pH 6.0) |
